the amount of nitrogen fertilizer is an effective factor on the growth, development, and reproduction of phytophagous insects. to investigate the effect of nitrogen fertilization on intrinsic rate of increase of cabbage aphid, brevicoryne brassicae l., plants rape oilseed (rgs003cultivar) were treated with four nitrogen levels (zero (check) 50, 100, and 150% of recommended levels. the results s...

in order to study the effects of different irrigation regimes and nitrogen fertilizer levels on yield and yield components of chickpea (ilc482), a field experiment involving chickpea genotype ilc482 was conducted as factorial arrangement based on a randomized complete block design with four replications in the agricultural research station, ferdowsi university of mashhad during growing season o...

The experimental was split plot in a randomized complete block design with three replications. In this experiment, different levels of nitrogen in the main plots included four levels (0, 50, 100 and 150 N) kg.ha-1 urea and wheat varieties, including cultivars, Sepahan and SW were placed in the subplots. Results showed that nitrogen fertilizer and cultivar were significant effects on ...

A field experiment was conducted during the rainy season of 2008 and 2009 to use guttation fluid as a physiological marker for the screening of more nitrogen efficient rice genotypes on the basis of relationship between Guttation Fluid (GF) oozed by leaf tip and nitrogen use efficiency (NUE), grain yield (GY) and biological yield (BY) amongst five rice (KRH-2hybrid, Kasturiaromatic, Krishna Ham...

A field study was carried out during summer seasons of 2018 and 2019 at the Experimental Farm Faculty Environmental Agricultural Sciences, Arish University, El-Arish, North Sinai Governorate. Egypt, This aimed to investigate response three sunflower genotypes (Helianthus annus L., i.e. Giza-102, Sakha-53, Line 120 nitrogen levels N1=15, N2= 30, N3= 45 kg N fed-1to maximize seed oil yields crop ...

for a determination of optimum levels of water and nitrogen fertilizer, as regards corn yield and nitrate movement in soil, a split-plot experiment, using a randomized complete block design of three replications was conducted in safiabad agricultural research center, on a silty clay loam soil. three irrigation levels (50, 75, and 100% of water requirement) and three nitrogen fertilizer levels (...

this research was carried out at agricultural and natural resources research center, isfahan, islamic republic of iran (kabootar abad) for two years (2006-2007). the experiment was conducted as a split plot arranged in randomized block design with four replications. treatments were four levels of n fertilizer [110, (160 = soil and water research institute recommendation), 210 and 260 kg ha-1] a...